This code appears when there is a fuel related issue with the vehicle. This can be fuel pressue cause by a clogged fuel filterof a failing fuel pump. In some cases it can also be a clogged return line or failing fuel pressure regulator. In most vehiclesthat have a secondary fuel delivery system, the second or high pressure pump has failed and will need; to be replaced.
CODE P1239 : Speed fuel pump positive feed fault
GENERIC CODE P1239 : MANUFACTUR CONTROLLED AIR/FUEL CONTROL CIRCUIT
ODII GLOBAL CODE P1239 : MANUFACTUR CONTROLLED AIR/FUEL CONTROL CIRCUIT
Generally all vehicles from 1996 and up have an OBD II computer. The Major problem when it comes to OBD II is that you can no longer acquire the trouble codes by counting the flashes of the Check Engine light like you could on earlier OBD I vehicles. You can take your car into a local high-tech service shop, where the minimum charge for computer diagnostics and engine diagnostics might cost you somewhere into three digits. Or you may want to learn about OBD II systems. in order to do so you will need an OBD II scan tool. I have already done the research for you and located several different scan tools for you to choose from. If you already have the code and need to know what it means check out our complete list of OBD II Codes Here.
OBD II scan tools connect to the vehicle's computer through a connector under the dash by the steering wheel.